cause org.apache.ibatis.ognl.OgnlException: source is null for getProperty(null, “xxx”)

mapper 映射对象 OgnlException问题

cause org.apache.ibatis.ognl.OgnlException: source is null for getProperty(null, “xxx”)

public class test{

	private Referral referral;
	private Condition condition;
	private Patient patient;
	｝

		
			
		    
		    
		    
				
				
		    
		    
				
				
			
	

		
			
				and br.Referral_id=#{testWhere.referral.referralId}
			
		
		
	

//后台必须new
ReferralAndConditionAndPatient referralAndConditionAndPatient = new ReferralAndConditionAndPatient();
		
		Referral referral = new Referral();
		referralAndConditionAndPatient.setReferral(referral);
		
		Condition condition = new Condition();
		referralAndConditionAndPatient.setCondition(condition);
		
		Patient patient = new Patient();
		referralAndConditionAndPatient.setPatient(patient);
		

转载
https://blog.csdn.net/qq_38650613/article/details/80886273